Dr. Johnson Jack Clark Jr., MD
- Part D claims, 2023
- 24
- Hospital affiliations
- 1
- State licenses
- 3
- Year NPI issued
- 2007
- Practice address
- 525 West Acacia Street, Stockton, CA 95203
- Practice phone
- Call (209) 944-5550
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Clark's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Johnson Jack Clark Jr. is an internist in Stockton, California
Dr. Clark practices at Dameron Hospital in Stockton, California, part of Dameron Hospital.
Dr. Clark's NPI, 1104976810, was assigned on January 12, 2007. Dr. Clark graduated from University of Toledo College of Medicine and Life Sciences in 1993. Dr. Clark holds California license G85287.
- NPI
- 1104976810NPI Registry (opens in a new tab)
- NPI enumeration date
- January 12, 2007
- NPI status
- Active
- Practice phone
- (209) 944-5550
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Johnson Jack Clark Jr. practices at Dameron Hospital in Stockton, California
Dr. Clark's primary practice is Dameron Hospital, at 525 West Acacia Street, Stockton, CA 95203 in San Joaquin County. The practice phone is (209) 944-5550.
- Dameron Hospital525 West Acacia Street, Stockton, CA 95203 · San Joaquin CountyPhone(209) 944-5550
Source: Dmand AI Affiliation Data
Dr. Johnson Jack Clark Jr. is affiliated with 1 site of care
Dr. Clark's primary practice is Dameron Hospital in Stockton, California, part of Dameron Hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Johnson Jack Clark Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Clark practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dameron Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Dameron Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Johnson Jack Clark Jr. is one of 16,751 internists in California
Internal medicine is Dr. Clark's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Clark is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Clark's licenses on file in 3 states: California, Ohio and Wisconsin.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Ohio license
- Wisconsin license
Internists near Dr. Clark
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Johnson Jack Clark Jr.'s patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Dr. Clark's median patient age at 44, with 50% women.
Dr. Clark's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Johnson Jack Clark Jr. wrote 24 Medicare Part D claims in 2023
In 2023, Dr. Clark wrote 24 Medicare Part D claims. They cover 1 drug, with $1,258 in total drug cost. In 2022, CMS named 25 claims across 1 drug.
Dr. Clark's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 252023: 244%
Drugs named by CMS: 1 in 2023, 1 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Johnson Jack Clark Jr. has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Clark, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Clark
- 2011
- CMS Stage 1 2012
- Undated
- AOA
Source: Dmand AI Professional Profile Data
Dr. Johnson Jack Clark Jr. graduated from University of Toledo College of Medicine and Life Sciences
Dr. Clark graduated from University of Toledo College of Medicine and Life Sciences in 1993.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Johnson Jack Clark Jr.'s profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Johnson Jack Clark Jr.
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Johnson Jack Clark Jr.'s NPI number?
Dr. Johnson Jack Clark Jr.'s NPI number is 1104976810. It was assigned on January 12, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Johnson Jack Clark Jr.?
Dr. Johnson Jack Clark Jr. is an internist in Stockton, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Johnson Jack Clark Jr. practice?
Dr. Clark practices at 525 West Acacia Street, Stockton, CA 95203. Dr. Clark's primary practice is Dameron Hospital in Stockton, California, part of Dameron Hospital.
What is Dr. Johnson Jack Clark Jr.'s office phone number?
The practice phone on file for Dr. Clark is (209) 944-5550.
What is Dr. Johnson Jack Clark Jr.'s medical license number?
Dr. Clark holds California license G85287, one of the licenses on file in 3 states.
Which states has Dr. Johnson Jack Clark Jr. been licensed in?
Dmand AI has state licenses on file for Dr. Clark in California (1999 to 2027), Ohio (1996 to 2003) and Wisconsin (1994 to 1997).
Which hospitals is Dr. Johnson Jack Clark Jr. affiliated with?
Dr. Clark practices at Dameron Hospital in Stockton, California.
Is Dr. Johnson Jack Clark Jr. board certified?
Yes. Dr. Clark is board certified in family medicine by the American Board of Family Medicine.
Where did Dr. Johnson Jack Clark Jr. go to medical school?
Dr. Clark graduated from University of Toledo College of Medicine and Life Sciences in 1993.
What drugs does Dr. Johnson Jack Clark Jr. prescribe most?
In 2023 Medicare Part D data, Dr. Clark's most prescribed drugs by claims were Adacel Tdap.
How long has Dr. Johnson Jack Clark Jr. been practicing?
Dr. Clark graduated from medical school in 1993, 33 years ago.
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